Flights from Boston to St. Louis with United Airlines

Our cheapest offers for flights from Boston to St. Louis

Here you can compare cheap flights from Boston (BOS) to St. Louis (STL) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to St. Louis. Prices and availability may change at any time.

Outbound Return Airlines Shop Baggage Price
Boston
St. Louis
Outbound
09/25/25
1 Stopover (ORD)
UA1414, AA2514
18h 48min
Return
10/05/25
1 Stopover (ATL)
F94474, F93512
16h 58min
United Airlines, American Airlines ?
$298
Boston
St. Louis
Outbound
09/25/25
1 Stopover (IAD)
UA1734, UA4427
05h 32min
Return
10/05/25
1 Stopover (ORD)
UA4605, UA2067
05h 02min
United Airlines ?
$421
Boston
St. Louis
Outbound
09/25/25
1 Stopover (ORD)
UA1414, UA2618
10h 44min
Return
10/05/25
1 Stopover (ORD)
UA4605, UA2067
05h 02min
United Airlines
$460
Prices based on recent searches, subject to last-minute changes
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Important flight information

Flight information: Boston - St. Louis

Roundtrip from $297.92
Flight duration min. 03:15 / max. 09:55
Return flight duration min. 02:30/ max. 10:00
Distance 1682 km
Flights per week 28
Departure airport Airport Boston Logan International Airport, MA (BOS)
Arrival airport Airport St. Louis - Lambert International Airport (STL)
Destination country Flights to United States
Alternative routes to United States
Alternative flights to St. Louis
Flight destinations with a similar price
Flight destinations with a similar price